Acid line for paper mills



J. J. CASE.

ACID LINE FOR PAPER MILLS.

APPLICATION FILED OCT. 8, 1-920.

Patented Aug.

Hr tTEl tT JGHN 3'. CASE, OF SARATOGA SPRINGS, NEW YORK, ASSIGNOR T0 BAKER IVIANUFAG- TUBING CORPOBATIQH, OE SABATQG'A SPIEINGFB, NEW YORK, A COR'IEORATION OF NEW YORK.

ACID LINE F013, PAPER MILLS.

Specification of Letters latent.

Patented 22, 11.922.

T 0 all whom it may concern.

Be it known that I, JOHN J. CAsn, a citi- Zen of the United States, residing at Saratoga Springs, in the county of Saratoga and State of New York, have invented an Improvement in Acid Lines for Paper Mills, of which the following is a specification.

In the use of the acid lines in paper mill work as is generally understood the material of which the pipes, valves and other devices comprising the lines is composed rapidly wears or is eaten away from the inside due to the action of the acid and the pressure thereon. This as is also appreciated often l ads to serious and sometimes fatal results. I he object of my present invention is to include in the acid lines in paper mill work a tell tale plug by which after the material has been worn or eaten away to apredetermined extent the acid in the line will fiow through the plug to indicate the condition of the line so as to enable the operator to renew or replace the worn part of the line in due time without necessitating the shutting down of the mill and the consequent tying up of the production. In carrying out the invention, therefore, either in the pipe line or a valve or other device in the same, I provide an opening preferably tapped and extending part way through the wall from the outer side and insert therein a plug which has a longitudinal bore therethrough and a recess at its inner end and a boss at its outer end for the particular purposes which will be hereinafter more particularly described.

In the drawing:

Fig. 1 is a sectional view illustrating a part of the pipe line fitted with the tell-tale plug.

Fig. 2 is a similar view showing the parts of the pipe line worn away to permit the acid under pressure to flow through the bore in the plug. and

Fig. 3 is also a sectional view showing the parts of the plug after they have been peened to temporarily stop the flow of the acid through the bore of the plug.

Referring particularly to the drawing, 10 indicates a portion of a wall of a pipe or valve or any other device which may be empolyed in an acid line in paper mill work. In a suitable position this wall 10 is fitted with one or more openings 11 each of which is preferably tapped as indicated in the drawing. In each of these tapped openings there is fitted a plug 12 screw threaded to be turned down into the tapped opening and provided at one end with a head 13 by which it may be turned to place, and fitted'centrally with a bore 14 which maybe of any desired diameter, and at its inner end with a recess 15 which, as shown, is substantially semi-spherical but which, as will be understood, may be of any suitable configuration. Furthermore the face of the plug may be fitted with a boss 16 providing therein sufficient metal to permit the same to be peened to temporarily close the bore, as hereinafter described.

In the use of this tell-tale plug, the material forming the pipe line or valve or other devices worn or eaten away by the action of the acid flowing through the same until the part of the pipe, for example, overlying the recess 15 at the inner end of the plug becomes so thin as to break under the pressure exerted upon the same by the acid in the line. When this worn away portion of the wall thus breaks the acid in the line is permitted to How through the crevice or crack thus made into the recess 15 and through the bore 14 to indicate that the wall is worn away to a sufficient extent to requirei'enewal and when this happens, as will be understood, the: leak thus made may be temporarily stopped by peening the metal in the boss 16 to close the bore 14: as indicated i Fig. 8 of the drawing. In this manner the worn part may be replaced at the convenience of the operators of the mill without making a special shut down for this purpose necessary, and furthermore as will be appreciated, oftentimes prevents what might otherwise be serious or fatal accidents.

I claim as my invention:

1. In a pipe line, a wall having an opening therein extending partially through the same from the outer side thereof, and a plug fitting said opening and having a longitudinal bore so that when the inner portion of the wall is worn away to the plug the fluid in the line is permitted to flow through {he bore to indicate the condition of the 2. In a pipe line, a wall having a tapped opening therein extending from the outer surface thereof partially through the said wall, and a screw threaded plug fitted in Med! the said tapped opening and having a longitudinal bore therethrough so that when the inner portion of the wall is worn away to the plug the fluid in the line is permitted. to flow through the bore to indicate the condition of the line.

3'. In a pipe line, a wall having a tapped opening therein extending partially through the same from the outer side thereof, and a plug fitting said opening and having a longitudinal bore therethrough and a recess at the inner end of the plug so that when the material forming the wall wears away to a predetermined extent the pressure of the fluid in the pipe line breaks the wall adjacent the recess in the inner end of the plug and permits the fluid in the pipe line to flow through the bore in the plug.

t. 1n a pipe line, a wall having a tapped opening therein extending partially through the same from the exterior thereof, and a plug fitting the said tapped opening having a longitudinal bore therethrough and a boss on the face of the plug so that when the pipe line wears away to a predetermined extent the fluid therein will flow through the bore in the plug which may then be temporarily stopped by peening the material included in the boss at the face of the plug.

5. In a pipe line, a wall having a tapped opening therein extending partially through the same from the exterior thereof, and a screw threaded plug fitting the tapped opening, having a longitudinal bore therethrough, a recess at the inner end thereof, and a boss on the face thereoi so that when the material of which the pipe line is composed is worn away to a predetermined ex tent the pressure within the pipe line breaks the wall adjacent the recess at the inner end of the plug permitting the fluid in the pipe line to flow through the bore in the plug to indicate this condition and making it possible to temporarily stop the flow through the bore in the plug by peening the material included in the boss on the face of the plug so as to close the said bore.

Signed by me this th day of May, 1920.

. JOHN J. CASE. 

